Jackson is "the Java JSON library" or "the best JSON parser for Java". Or simply as "JSON for Java".

Jackson Core Source Code files are provided in the source packge (jackson-core-2.14.0-sources.jar). You can download it at Jackson Maven Website.

You can also browse Jackson Core Source Code below:

⏎ com/fasterxml/jackson/core/sym/Name3.java

package com.fasterxml.jackson.core.sym;

/**
 * Specialized implementation of PName: can be used for short Strings
 * that consists of 9 to 12 bytes. It's the longest special purpose
 * implementaion; longer ones are expressed using {@link NameN}.
 */
public final class Name3 extends Name
{
    private final int q1,  q2, q3;

    Name3(String name, int hash, int i1, int i2, int i3) {
        super(name, hash);
        q1 = i1;
        q2 = i2;
        q3 = i3;
    }

    // Implies quad length == 1, never matches
    @Override
    public boolean equals(int quad) { return false; }

    // Implies quad length == 2, never matches
    @Override
    public boolean equals(int quad1, int quad2) { return false; }

    @Override
    public boolean equals(int quad1, int quad2, int quad3) {
        return (q1 == quad1) && (q2 == quad2) && (q3 == quad3);
    }

    @Override
    public boolean equals(int[] quads, int qlen) {
        return (qlen == 3) && (quads[0] == q1) && (quads[1] == q2) && (quads[2] == q3);
    }
}

⏎ com/fasterxml/jackson/core/sym/Name3.java

Or download all of them as a single archive file:

File name: jackson-core-2.14.0-sources.jar
File size: 497693 bytes
Release date: 2022-11-05
Download 

⇒ Download and Install Jackson Binary Package

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⇑ Downloading and Reviewing jackson-*.jar

⇑⇑ Jackson - Java JSON library